This Old Navy pajama set is designed for unisex kids in size X-Large (12) and features a Santa Claus theme with the word "Believe" on the top. The set includes a long sleeve top and matching bottoms, both made of cotton flannel material in a colorful multicolor design. This two-piece pajama set is machine washable and perfect for the winter and fall seasons, adding a festive touch to bedtime with its Christmas theme.